Mint a token - Hedera

Minting fungible token allows you to increase the total supply of the token. Minting a non-fungible token creates an NFT with its unique metadata for the class of NFTs defined by the token ID. The Supply Key must sign the transaction.

If no Supply Key is defined, the transaction will resolve to TOKEN\_HAS\_NO\_SUPPLY\_KEY. The maximum total supply a token can have is 2^63-1.
The amount provided must be in the lowest denomination possible.
- Example: Token A has 2 decimals. In order to mint 100 tokens, one must provide an amount of 10000. In order to mint 100.55 tokens, one must provide an amount of 10055.
The metadata field is specific to NFTs. Once an NFT is minted, the metadata cannot be changed and is immutable.
- You can use the metadata field to add a URI that contains additional information about the token. You can view the metadata schema here. The metadata field has a 100-character limit.
The serial number for the NFT is returned in the receipt of the transaction.
When minting NFTs, do not set the amount. The amount is used for minting fungible tokens only.
This transaction accepts zero unit minting operations for fungible tokens (HIP-564)

Transaction Signing Requirements

Supply key
Transaction fee payer account key

Transaction Fees

Please see the transaction and query fees table for the base transaction fee.
Please use the Hedera fee estimator to estimate your transaction fee cost.

Constructor

Constructor	Description
`new TokenMintTransaction()`	Initializes the TokenMintTransaction object

Transaction Properties

Method	Type	Requirement
`setTokenId(<tokenId>)`	TokenId	Required
`setAmount(<amount>)`	long	Optional (fungible)
`addMetadata(<metadata>)`	byte[]	Optional (NFT)
`setMetadata(<metadataList>)`	List<byte[]>	Optional (NFT)
`setHighVolume(<highVolume>)`	boolean	Optional

Get Transaction Values

Method	Type	Description
`getTokenId()`	TokenId	Returns the token ID
`getAmount()`	long	Returns the amount to mint (fungible)
`getMetadata()`	List<byte[]>	Returns the metadata list (NFT)
`getHighVolume()`	boolean	Returns whether this transaction uses high-volume throttles

This transaction supports high-volume entity creation (HIP-1313). Setting setHighVolume(true) routes the transaction through dedicated high-volume throttle capacity with variable-rate pricing for both fungible and NFT mints. Always pair this with setMaxTransactionFee() to cap your costs.

//Mint another 1,000 tokens
TokenMintTransaction transaction = new TokenMintTransaction()
     .setTokenId(tokenId)
     .setMaxTransactionFee(new Hbar(20)) //Use when HBAR is under 10 cents
     .setAmount(1000);

//Freeze the unsigned transaction, sign with the supply private key of the token, submit the transaction to a Hedera network
TransactionResponse txResponse = transaction
     .freezeWith(client)
     .sign(supplyKey)
     .execute(client);

//Request the receipt of the transaction
TransactionReceipt receipt = txResponse.getReceipt(client);

//Obtain the transaction consensus status
Status transactionStatus = receipt.status;

System.out.println("The transaction consensus status is " +transactionStatus;

//v2.0.1

//Mint another 1,000 tokens and freeze the unsigned transaction for manual signing
const transaction = await new TokenMintTransaction()
     .setTokenId(tokenId)
     .setAmount(1000)
     .setMaxTransactionFee(new Hbar(20)) //Use when HBAR is under 10 cents
     .freezeWith(client);

//Sign with the supply private key of the token 
const signTx = await transaction.sign(supplyKey);

//Submit the transaction to a Hedera network    
const txResponse = await signTx.execute(client);

//Request the receipt of the transaction
const receipt = await txResponse.getReceipt(client);
    
//Get the transaction consensus status
const transactionStatus = receipt.status;

console.log("The transaction consensus status " +transactionStatus.toString());

//v2.0.7

//Mint another 1,000 tokens and freeze the unsigned transaction for manual signing
transaction, err = hedera.NewTokenMintTransaction().
		SetTokenID(tokenId).
		SetAmount(1000).
		//Use when HBAR is under 10 cents
		SetMaxTransactionFee(hedera.HbarFrom(20, hedera.HbarUnits.Hbar)).
		FreezeWith(client)

if err != nil {
		panic(err)
}

//Sign with the supply private key of the token, submit the transaction to a Hedera network
txResponse, err := transaction.
		Sign(supplyKey).
		Execute(client)

if err != nil {
		panic(err)
}

//Request the receipt of the transaction
receipt, err = txResponse.GetReceipt(client)

if err != nil {
		panic(err)
}

//Get the transaction consensus status
status := receipt.Status

fmt.Printf("The transaction consensus status is %v\n", status)

//v2.1.0

// Mint another 1,000 tokens
let transaction = TokenMintTransaction::new()
    .token_id(token_id)
    .amount(1000)
    .max_transaction_fee(Hbar::from(20)); // Use when HBAR is under 10 cents

// Freeze the unsigned transaction, sign with the supply private key of the token
let tx_response = transaction
    .freeze_with(&client)?
    .sign(supply_key)
    .execute(&client).await?;

// Request the receipt of the transaction
let receipt = tx_response.get_receipt(&client).await?;

// Get the transaction consensus status
let status = receipt.status;

println!("The transaction consensus status is {:?}", status);

// v0.34.0

​Constructor

​Transaction Properties

​Get Transaction Values

Constructor

Transaction Properties

Get Transaction Values